What is the search depth of AlphaGo and AlphaGo Zero?
For easier visualization, I recommend this video:
https://twitter.com/i/status/1257053365424578565
The more detailed article about GO algorithms:
https://deepmind.com/blog/article/alphago-zero-starting-scratch.
With its breadth of $250$ possible moves each turn (go is played on a $19$ by $19$ board, compared to the much smaller $8$ by $8$ chess field) and a typical game depth of $150$ moves, there are about $250^{150}$, or
$10^{360}$.
After $2$ moves in go, it's $130000$ possible combinations.
Decision tree pruning